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Diffstat (limited to 'Documentation/admin-guide/sysctl/xen.rst')
| -rw-r--r-- | Documentation/admin-guide/sysctl/xen.rst | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/Documentation/admin-guide/sysctl/xen.rst b/Documentation/admin-guide/sysctl/xen.rst new file mode 100644 index 000000000000..6c5edc3e5e4c --- /dev/null +++ b/Documentation/admin-guide/sysctl/xen.rst @@ -0,0 +1,31 @@ +=============== +/proc/sys/xen/ +=============== + +Copyright (c) 2026, Shubham Chakraborty <chakrabortyshubham66@gmail.com> + +For general info and legal blurb, please look in +Documentation/admin-guide/sysctl/index.rst. + +------------------------------------------------------------------------------ + +These files show up in ``/proc/sys/xen/``, depending on the +kernel configuration: + +.. contents:: :local: + +balloon/hotplug_unpopulated +=========================== + +This flag controls whether unpopulated memory ranges are automatically +hotplugged as system RAM. + +- ``0``: Unpopulated ranges are not hotplugged (default). +- ``1``: Unpopulated ranges are automatically hotplugged. + +When enabled, the Xen balloon driver will add memory regions that are +marked as unpopulated in the Xen memory map to the system as usable RAM. +This allows for dynamic memory expansion in Xen guest domains. + +This option is only available when the kernel is built with +``CONFIG_XEN_BALLOON_MEMORY_HOTPLUG`` enabled. |